see one of the following methods to confirm the hard drive size.
1.How to Check Your Hard Disk Space on windows 7, 8 and 10
Method 1: My Computer
This method provides details of the hard drive(s) of your PC using My Computer.
Click Start and then click My Computer.
Select Local Disk (C or D).
View the Local Disk (C:) information under Details in the left or bottom column.
Method 2: Computer Management
Click Start and then Run.
Type compmgmt.msc and click Ok.
Under Storage, click Disk Management. The drive capacity is listed under capacity.